Campbell CR800 Manual do Utilizador descarregar pdf (Página 7)

Air Quality

The CR800 series can monitor and control gas analyzers, particle

samplers, and visibility sensors. The datalogger can also automatical-

ly control calibration sequences and compute conditional averages

that exclude invalid data (e.g., data recorded during power failures or

calibration intervals).

Water Resources/Aquaculture

Our CR800 series is well-suited to remote, unattended monitoring

of hydrologic conditions. Most hydrologic sensors, including SDI-12

probes, interface directly to the datalogger.

Typical hydrologic measurements:

Water level is monitored with incremental shaft encoders, double

bubblers, ultrasonic ranging sensors, resistance tapes, strain gage

pressure transducers, or vibrating wire pressure transducers. Vi-

brating wire transducers require an CDM-VW300-series, AVW200-

series or another vibrating wire interface.

Well draw-down tests use a pressure transducer measured at

logarithmic intervals or at a rate based on incremental changes

in water level.

Ionic conductivity measurements use one of the switched

excitation ports from the datalogger.

Samplers are controlled by the CR800 or CR850 as a function of

time, water quality, or water level.

Alarm and pump actuation are controlled through digital I/O

ports that operate external relay drivers

Vehicle Testing

This versatile, rugged datalogger is ideally suited for testing cold and

hot temperature, high altitude, o-highway, and cross-country per-

formance. The CR800 and CR850 are compatible with our SDM-CAN

interface, GPS16X-HVS receiver.

Soil Moisture

The CR800 and CR850 are compatible with the following soil mois-

ture measurement technologies:

Soil moisture blocks are inexpensive sensors that estimate soil

water potential.

Matric water potential sensors also estimate soil water potential

but are more durable than soil moisture blocks.

Time-Domain Reectometry Systems (TDR) use a reectom-

eter controlled by the datalogger to accurately measure soil water

content. Multiplexers allow

sequential measurement of

a large number of probes

by one reectometer.

Self-contained water

content reectometers

are sensors that emit and

measure a TDR pulse.

Tensiometers measure

the soil pore pressure of

irrigated soils and calculate

soil moisture.

Other Applications

Wireless sensor/datalogger

networks

Avalanche forecasting,

snow science, polar, high

altitude.

Fire weather

Geotechnical

Historic preservation

The CR800-series dataloggers are ideal for monitoring water quality

and level at reservoirs, springs, canals, pipelines, and culinary sites.

Vehicle monitoring includes not only passenger cars, but

airplanes, locomotives, helicopters, tractors, buses, heavy

trucks, drilling rigs, race cars, and motorcycles.

Data measured by this weather sta-

tion near Aspen, Colorado is used in

avalanche forecasting.

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